I'll play devil's advocate.

- Re: 5 kits, I've seen Ben give them away to readers in raffles.
- Re: scavenging after the flight, presumably that is unobtrusive, whereas asking for an extra demands someone's time and attention.

My last flight had an empty seat next to me, and I swiped the pack of headphones from that seat. But I'd never just ask for an extra pack.